linux-kernel - Re: [PATCH] crypto: chtls - use 64-bit arithmetic instead of 32-bit

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Message-ID: <20180713103331.5574mnd4ecjson7n@gondor.apana.org.au>
Date:   Fri, 13 Jul 2018 18:33:31 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Cc:     Harsh Jain <harsh@...lsio.com>,
        "David S. Miller" <davem@...emloft.net>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] crypto: chtls - use 64-bit arithmetic instead of 32-bit

On Wed, Jul 04, 2018 at 11:37:20AM -0500, Gustavo A. R. Silva wrote:
> Cast *val* to u64 in order to give the compiler complete
> information about the proper arithmetic to use.
> 
> Notice that such variable is used in a context that expects an
> expression of type u64 (64 bits, unsigned) and the following
> expression is currently being evaluated using 32-bit arithmetic:
> 
> val << bit_pos
> 
> Addresses-Coverity-ID: 1467425 ("Unintentional integer overflow")
> Signed-off-by: Gustavo A. R. Silva <gustavo@...eddedor.com>

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
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